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Re: Frozen hammer/tumbler
Posted by Pete Nelson on Monday, 24 January 2011, at 10:27 p.m., in response to Re: Frozen hammer/tumbler, posted by Ernie Brandt on Monday, 24 January 2011, at 9:52 p.m.
And I too am very blessed, Son!
ANYHOW - - - Actually the one I described here earlier today was my first version and had been made from a couple of scraps of relatively-hard Poplar planking. The one I ended up using for most of my repair jobs was made from (2) 6.50" long pieces of 4 x 1/2 Red Oak planking glued and clamped together (the finished overall size was 3.50" wide x 6.50" long x 1.00" thick, nicely squared with all faces finished smooth). The major problem was keeping the Lockplate flat - - and secured - - and preventing the Tumbler from bouncing around and flying all over the workbench when struck. I had milled out a slot for the bolster on the inside of the Lockplate so that the Lockplate could indeed lie flat, and I made the recess for the Tumbler a full 1.50" diameter x 0.62" deep to assure clearance under the inner face of the Tumbler. Then I "hogged" out a relief channel in the face of the Jig so that the curved surface of the Hammer wasn't touching the Jig at any point, thus allowing the Lockplate to sit quite flat on the face of the Jig. Trying to shim the Hammer face and inner surface of the Lockplate just did not work, and I eventually located clearance holes for the Lockplate bolts and drilled the Jig so that I could bolt the Lockplate right to the Jig and keep it rigid during the "pounding" operation. And I gave up trying to use a round drift-pin and went with a 3.00" long piece of 9/32" square steel bar stock with the four corners of the bottom (contact) face slightly chamfered to minimize damage to the face of the Tumbler boss. With a bit of care, the whole scheme worked pretty well.
And as an aside, I have been able to remove a half-dozen or more stuck/buggered Hammer Screws by VERY carefully drilling right down into the shank through the center of the screwdriver slot and then using an "E-Z-OUT" (a #1, I think it was) and carefully backing the remainder of the screw right out. It, of course, ruins the Hammer Screw - - but it saves the far more expensive Tumbler.
Take care, and best regards,
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